<template>
  <div class="menu-bar">
    <transition name="slide-up">
      <div class="menu-wrapper"
        v-show="ifTitleAndMenuShow"
        :class="{'hide-box-shadow':ifSettingShow}"
      >
        <div class="icon-wrapper">
          <span class="icon-menu icon"></span>
        </div>
        <div class="icon-wrapper">
          <span class="icon-progress icon" @click="showSetting(2)"></span>
        </div>
        <div class="icon-wrapper">
          <span class="icon-bright icon" @click="showSetting(1)"></span>
        </div>
        <div class="icon-wrapper">
          <span class="icon-a icon" @click="showSetting(0)">A</span>
        </div>
      </div>
    </transition>
    <transition name="slide-up">
      <div class="setting-wrapper" v-show="ifSettingShow">
        <div class="setting-font-size" v-if="showTag===0">
          <div class="preview"
            :style="{fontSize:fontSizeList[0].fontSize+'px'}"
          >A</div>
          <div class="select">
            <div class="select-wrapper"
              v-for="(item,index) in fontSizeList"
              :key="index"
              @click="setFontSize(item.fontSize)"
            >
              <div class="line"></div>
              <div class="point-wrapper">
                <div class="point"
                v-show="defaultFontSize===item.fontSize"
                >
                  <div class="small-point"></div>
                </div>
              </div>
              <div class="line"></div>
            </div>
          </div>
          <div class="preview"
            :style="{fontSize:fontSizeList[fontSizeList.length-1].fontSize+'px'}"
          >A</div>
        </div>
        <div class="setting-theme" v-else-if="showTag===1">
          <div class="setting-theme-item"
            v-for="(item,index) in themeList"
            :key="index"
            @click="setTheme(index)"
          >
            <div class="preview"
              :style="{background:item.style.body.background}"
              :class="{'no-border':item.style.body.background!=='#fff'}"
            ></div>
            <div class="text"
              :class="{'selected':index===defaultTheme}"
            >{{item.name}}</div>
          </div>
        </div>
        <div class="setting-progress">
          <div class="progress-wrapper">
            <input
              type="range"
              class="progress"
              max="100"
              min="0"
              step="1"
              @change="onProgressChange($event.target.value)"
              @input="onProgressInput($event.target.value)"
              :value="progress"
              :disabled="!bookAvailable"
              ref="progress">
          </div>
          <div class="text-wrapper">
            <span>{{bookAvailable ? progress + '%' : '加载中...'}}</span>
          </div>
        </div>
      </div>
    </transition>
  </div>
</template>

<script>
export default {
  props: {
    ifTitleAndMenuShow: Boolean,
    fontSizeList: Array,
    defaultFontSize: Number,
    themeList: Array,
    defaultTheme: Number,
    bookAvailable: Boolean
  },
  data() {
    return {
      ifSettingShow: false,
      showTag: 0,
      progress: 0
    }
  },
  methods: {
    showSetting(tag) {
      this.ifSettingShow = true
      this.showTag = tag
    },
    hideSetting() {
      this.ifSettingShow = false
    },
    setFontSize(fontSize) {
      this.$emit('setFontSize', fontSize)
    },
    setTheme(index) {
      this.$emit('setTheme', index)
    },
    onProgressChange(progress) {
      this.$emit('onProgressChange', progress)
    },
    onProgressInput(progress) {
      this.progress = progress
      this.$refs.progress.style.backgroundSize = `${this.progress}% 100%`
    }
  }
}
</script>

<style lang="scss" scoped>
@import '../assets/styles/global';
.menu-bar{
  height: 100%;
  .menu-wrapper{
    position: absolute;
    bottom: 0;
    left: 0;
    display: flex;
    width: 100%;
    height: px2rem(48);
    z-index: 101;
    background-color: #fff;
    box-shadow: 0 px2rem(-8) px2rem(8) rgba(0,0,0,.15);
    &.hide-box-shadow{
      box-shadow: none;
    }
    .icon-wrapper{
      flex: 1;
      @include center;
      .icon-progress {
        font-size: px2rem(28);
      }
      .icon-bright {
        font-size: px2rem(24);
      }
    }
  }
  .setting-wrapper{
    position: absolute;
    bottom: px2rem(48);
    left: 0;
    z-index: 100;
    width: 100%;
    height: px2rem(60);
    box-shadow: 0 px2rem(-8) px2rem(8) rgba(0,0,0,.15);
    background-color: #fff;
    .setting-font-size{
      display: flex;
      height: 100%;
      .preview{
        flex: 0 0 px2rem(40);
        @include center;
      }
      .select{
        display: flex;
        flex: 1;
        .select-wrapper{
          flex: 1;
          display: flex;
          align-items: center;
          &:first-child{
            .line{
              &:first-child{
                border-top: none;
              }
            }
          }
          &:last-child{
            .line{
              &:last-child{
                border-top: none;
              }
            }
          }
          .line{
            flex:1;
            height: 0;
            border-top: px2rem(1) solid #ccc;
          }
          .point-wrapper{
            position: relative;
            flex: 0 0 0;
            width: 0;
            height: px2rem(7);
            border-left: px2rem(1) solid #ccc;
            .point{
              position: absolute;
              top: px2rem(-8);
              left: px2rem(-10);
              width: px2rem(20);
              height: px2rem(20);
              border-radius: 50%;
              background-color: #fff;
              border: px2rem(1) solid #ccc;
              box-shadow: 0 px2rem(4) rgba(0,0,0,.15);
              @include center;
              .small-point{
                width: px2rem(5);
                height: px2rem(5);
                background-color: #000;
                border-radius: 50%;
              }
            }
          }
        }
      }
    }
    .setting-theme{
      height: 100%;
      display: flex;
      .setting-theme-item{
        flex: 1;
        display: flex;
        flex-direction: column;
        padding: px2rem(5);
        box-sizing: border-box;
      }
      .preview{
        flex: 1;
        border: px2rem(1) solid #ccc;
        box-sizing: border-box;
        &.no-border{
          border: none;
        }
      }
      .text{
        flex:0 0 px2rem(20);
        font-size: px2rem(14);
        color: #999;
        @include center;
        &.selected{
          color: #000;
        }
      }
    }
    .setting-progress{
      position: absolute;
      width: 100%;
      height: 100%;
      .progress-wrapper{
        width: 100%;
        height: 100%;
        @include center;
        padding: 0 px2rem(30);
        box-sizing: border-box;
        .progress{
          width: 100%;
          -webkit-appearance:none;
          height: px2rem(2);
          background: -webkit-linear-gradient(#999,#999) no-repeat, #ddd;
          background-size: 0 100%;
          &:focus{
            outline: none;
          }
          &::-webkit-slider-thumb{
            -webkit-appearance: none;
            height: px2rem(20);
            width: px2rem(20);
            border-radius: 50%;
            background-color: #fff;
            box-shadow: 0 4px 4px 0 rgba(0,0,0,.15);
            border: px2rem(1) solid #ddd;
          }
        }
      }
      .text-wrapper {
        position: absolute;
        left: 0;
        bottom: 0;
        width: 100%;
        color: #333;
        font-size: px2rem(12);
        text-align: center;
      }
    }
  }
}
</style>
